I found a set of Ong's main strut dampers for the Legacy on my shelf (came with the plane from the builder) and was studying the literature dated 2004.  I am getting ready to service the struts.   The latest threads suggest motorcycle fork oil SAE30 weight for the struts.  Ong's instructions (after replacing the pucks) say MIL5606 which I would prefer but have not seen discussed.  My Legacy is 2004 vintage 560 hours.   Has anyone gone to 5606 for the struts or are there reasons not to?

Paul
Legacy RG (Spruce Creek)